Tʻoyang
By: [pʻyŏnjip Hong Uk-kŭn, Kim Kwang-il]
Series: Paektusan chʻongsŏ
Publisher: Kwahak Kisul Chʻulpʻansa
Published: 1992
Place of publication: [Pʻyŏngyang]
Language: kor
Number of pages: 328
Subjects: Soils
Notes: Cover title.